Mark is a student. He gets up at 6:20. He runs in the park for an hour. Then he has breakfast at 7:35. Before breakfast, he brushes his teeth and then washes his face. After breakfast, he goes to school at 7:50. Next, he has a math class at 8:00. After class, he often plays sports with his friends. He often does his homework after dinner. In the evening, he reads books and sleeps at 9:00.
![](http://static.xuejinqu.com/qimg/26e/26eb6052ba68082ba5165a8e74ff1d04.png)
![](http://static.xuejinqu.com/qimg/ee0/ee0c65e8cdc25a0f8a6d095a72dd4bfb.png)
![](http://static.xuejinqu.com/qimg/89f/89f64d123000efe08629f29c8cd52a7e.png)
![](http://static.xuejinqu.com/qimg/6b2/6b2ab49aa6ed8c6b3d3d10c5bcc56797.png)
![](http://static.xuejinqu.com/qimg/616/616b6cd06672e901ea718b3aa1c69802.png)
![](http://static.xuejinqu.com/qimg/f17/f17557d905d37b59d8e9b12b4bdbf0ac.png)
![](http://static.xuejinqu.com/qimg/9ba/9ba7f4f84da53805a707ac03572aefe3.png)
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)